What is the meaning of Light_up?

To illuminate, to bring light to something, to brighten.

To start to emit light; to become activated as a light source.

To show an increase in activity or a brightening of mood.

To ignite.

To light a cigarette, pipe, etc.

To light a cigarette, pipe, etc. for (someone).

To make happy.

To introduce (someone to something), to make someone aware of or interested in something; turn on.

To open fire on a target or group of targets, especially with rockets, a flamethrower, etc.

To shock (someone) with a stun gun.

To activate the emergency sirens on a police vehicle in order to pull someone over.

To loosen, slacken, or ease off.

Source: wiktionary.org